they are part of a troop build up that began in march after the speed of russia's an exation caught kiev by surprise. these border guards deployed from their base in central ukraine. half of them are still in training. border crossings throughout have been reinforced with mazz mass i gar kads and sandbags. b r. >> in that direction, the strench extends about 60 miles. ukraine hopes they will be able to avoid a war. perched on a hill top but not visible from the road, a paratroop paratrooper. >> camouflaged is a small group of paratroopers. >> the threat from within ukraine's borders is more immediate and menacing. as we were out filming, kiev lost control of yet another government building, the police doing nothing to stop the prorussians as they smashed windows and declared themselveses the authority. for the people living along the border it was a boundary in name only. now these hills could become one of many front lines. wolf this remains a region divided and those who do try to speak up for unity end up finding themselves in trouble. earlier a man tried to stop a woman from burning